Improvement in pumps



tetes ISAAC N. FORRESTER, OF RIDGEPORT,CONNECTICUT.

lLetters Patent No. 98,366, dated December 28, 1869.

IMPROVEMENT IN PUMPS.f

The Schedule referred to'iznx'these Letters Patentvand making part of the same.

- To all lzohom it may concern:

Be it known that I, ISAAC N. FonRss'rER, of Bridgeport, iu the county ot' Fairfield, and State of Connecticut, have'invented n. ncw and useful Improvement in Pumps, of which the following is a. full, clear, and exact description, reference being had to the accompanying drawings, which make part of this specifica-v tion, and in which- Figure 1 represents avextical central section through so much of a pump embracing my improvement as is necessary to illustrate the invention herein claimed.

Figure 2, ,an elevation of the pistou and discharge- Figure 3, a. plan view of the cylinder.

Figure 4, a view, in perspective, of one section-of the piston-valve..

Figure 5, a horizontal transverse section through the pump, at the'line x a: of tig. l.

The object of the invention herein claimed is so to combine the barrel with the piston-valve and piston that the valve can be held to its work without screws or other fastenings; and

The improvement consists in constructing the piston-valve in sections, so that when removed from the cylinder,it can readily be taken apart, but when in the cylinder, the sections, while free to work, are securely hcld in place by the cylinder its'elt'.

In the accompanying drawings, my improvement is shown as adapted to .a pump in which the piston and pipes are stationary, while the barrel is movable; but it is obvious that this arrangement might be reversed, and the pump still act efficientlyY In this instance, the pipe A serves merely as a support, and not a conduit.

.'lhe, piston A1 and discharge-pipe h2-are securely united tu the support A.

The piston consists of two diaphragms, a, connected by pillars` a', having.` water-spaces between them. (See figs. 1, 2, and.)

A cylinder, B, moves freely endwise on the pipes A A', and is provided with valves b b', opening inward.

An annular flanged pistou-valve, C, formed in two sections, (see fig. 4,) moves freely entlwise ofthe cylinder.

In operation, the sections of the valve C are first slipped over the piston, in such manner that their tianges c shall lit loosely between the diaphragms c. The pistou is then inserted inthe cylinder, and the heads secured in piace. In iig. ,1, the cylinder is shown on the down stroke. As it descends,the valve C falls upon the lower diaphragm, the lower valves b' open, and the water (in which the pumpis immersed) flows into the lower division of thec-ylinder, which is constantly enlarging. During this movement, the water in the upper section of the cylinder is forced up the discharge-pipe, as shown bythe arrow infif. 1, the valves b being closed by the vpressure from within. Oli the up stroke, the above-described movements are repeated.

I deem it unnecessary to describe in detaill the construction ot the other parts of the pump, as'they form no part of the subject-matter hereinclaimed.

I am awaiethat pumps in which the cylinder reciprocates while the piston is stationary are old, :ind do not claim such device. v

\Vhat I claim as my invention, and desire to secure by Letters Patent, isi l1. The annular anged'pistomvalve C, formed in two sections, -as'and for the purposes set forth.

2. The combination ofthe cylinder, thepiston, and the sectional valve, all constructed to operate as set forth.

In testimony whereof, I havev hereunto subscribed my name.

ISAAC N.- FORRESTER.

Witnesses: 4

JAS. H. Choeur, vCun'risi THOMPSON. 

